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This technics can distinct improve the ratio of taking off acetyl and the ratio of the Chitosan output.

在总结并完善国内外各种壳聚糖生产工艺的基础上,本公司研制出酶法生产壳聚糖工艺,该法大大提高了脱乙酰比率及壳聚糖的生成比率。

The reason of white band formation in the solidified shell in the mold has been studied by means of water modeling test and the analysis of the solidified microstructure of practical CC slab an.

为了定量把握结晶器中的钢水流动、钢水过热度及结晶器传热阻力对初期凝固坯壳的凝固不均一的影响,利用水冷铜板的浸渍实验,测定了各种铸造条件下的凝固坯壳厚度、凝固不均一度及树枝晶偏角;利用水力模型实验,并对实机铸坯的凝固组织分析,EPMA对负偏析带的线分析,得出了在结晶器中凝固坯壳上负偏析带的产生原因。

In order to solve some problems that the driving axle housings conformed to the demand of conventional design method,but it didn't accord with their professional standard in bench test.Based on the former study results,this paper has proposed a CAE design method for the driving axle housing.

为解决某些驱动桥壳虽然满足传统设计要求、但在台架试验中不符合行业标准的问题,在对驱动桥壳研究的基础上,提出了基于CAE的驱动桥壳设计方法。

In this paper, we use FEM software ANSYS to simulate. Using FEM to evaluate the strength of pressure hull, the FEM model of outer covering and stiffeners can use shell element to establish, but it may waste much computing time to calculate. Therefore, in this paper, we can evaluate more easier by making use of the idea of effective-width, and considering the stiffener/plating combined moment of inertia.

本文采用有限元素分析软体ANSYS进行求解,在有限元素分析的模拟上,外壳与环肋均可用壳元素建立一实体模型来分析,但是在模型的建立上过於复杂,在解析上也需要更多的时间来计算,因此本文采用有效幅度的观念,考虑环肋与壳板间之组合惯性矩,将环肋部分取梁元素来模拟,如此一来可简化建立模型的困难度,且大大的缩短分析的时间。

According to the characteristic of silver nanoparticles, their uniform dispersion in reaction media was obtained by surface modification, ultrasonic radiation and the select of emulsion, and then emulsion polymerization system were formed by combination with reactive monomer and initiator. Nano-Ag/Polystyrene core-shell particles were prepared by emulsion polymerization and their microstructure were characterized by TEM, FTIR, XPS, AFM and TG/DTA. The experimental results showed that silver nanoparticles were coated by polymer and the composite particles had typical core/shell structure, and the microlevel combination was realized. Meantime, the form mechanism of nano-Ag/polystyrene core-shell particles was tentatively researched. The conclusion is that the perfect coating was able to obtained by the control of reaction condition.

根据纳米银粒子的特性,借助于表面处理、超声辐照以及乳化剂的选择,使其均匀分散在反应介质中,再与反应单体、引发剂等形成乳液聚合体系;采用乳液聚合方法、包裹聚合方式,制备出纳米银/聚苯乙烯核壳复合粒子,并借助于TEM、FTIR、 XPS、AFM、TG/DTA等分析手段对复合粒子微观结构进行了表征;结果表明:纳米银粒子表面被聚合物层包覆,复合粒子呈明显的核壳结构,实现了微观尺度上的复合;同时,初步探讨了纳米银/聚苯乙烯核壳复合粒子的形成机理,指出:通过控制反应条件,可以使形成纳米银/聚苯乙烯核壳复合粒子的聚合反应方式占主导地位,实现最大限度地包覆。

Rat dermal fibrobalasts and human neofetus dermal fibroblasts were cultured in vitro to evaluate the biocompatibility of the chitosan films.

为考察壳聚糖对皮肤成纤维细胞的相容性,采用流延法制备了纯壳聚糖膜和含甘油的壳聚糖膜,并在所制备的壳聚糖膜上进行了大鼠皮肤成纤维细胞和人胎儿皮肤成纤维细胞的体外培养。

The mantle shear zone played an important role in continental blackup. Especially, the dissymmetry caused by simple shear deformation resulted in the different amount of extension in upcrust and subcrust, which in turn formed the detachment of the upper mantle from the crust, that is, the thinning positions of upper mantle and crust were different.

地幔剪切带在大陆裂解过程中起关键性作用,特别是简单剪切变形所产生的强烈不对称构造,以至壳上伸展量明显不同于壳下伸展量,壳幔明显折离,使得壳幔变薄区的位置明显分离,这将能很好地解释华北地台东部岩石圈地幔演化及其浅部盆地形成等的响应。

It shows that the average thickness of the surface layer of crystals,the palisade and cone layer and the eggshell membrane are 20.8,220.8 and 62.5μm,respectively,which accounting for 6.8%,72.6% and 20.6% of the total thickness of the eggshell.There are many vesicular holes in palisade layer with an average diameter of(0.32±0.08)μm(n=30).The function of such holes may be of significant to air exchange.The shape of eggshell pore on the surface layer of crystals is round or ellipsis.The fracture surface of the pore is funnel-shaped.

结果表明:白冠长尾雉卵壳的表面晶体层、栅栏锥体层和壳膜层的厚度分别为20.8,220.8和62.5μm,分别占卵壳总厚度的6.8%,72.6%和20.6%;栅栏层有很多蜂窝小孔,其直径为(0.32±0.08)μm(n=30);卵壳表面有许多圆形或椭圆形的气孔,可能与胚胎发育过程中的气体交换有关,气孔横断面呈细漏斗状,在其上半部有颗粒状填充物。

Coal pipe arrangement with upper and lower air broadcast broadcast coal coal coal, wind and sent the wind, in the burning rice husk, it is necessary to open the upper and lower coal-air broadcast, so that rice husk into the furnace can be more gentle.

给煤管上布置有上播煤风及下播煤风以及送煤风,在燃烧稻壳时,要开启上、下播煤风,使稻壳能比较平缓的进入炉膛。

In practice, flat shell element can be constructed by the simple combination of new plate bending element with plane elasticity element.

在实践上可以将新板弯曲单元与已有的平面弹性单元简单叠合来构造平板壳单元;在理论上则概括为平行列式的概念,即平板壳单元的膜、板两部分在相互平行的位移函数空间和弯矩函数空间上分别列式。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。